Mother’s Day is thought to______in the 1910s, isn’t it?

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问题 Mother’s Day is thought to______in the 1910s, isn’t it?

选项 A、first mark
B、be first marked
C、have first marked
D、have first been marked

答案D

解析 考查动词的时态和语态。句意为“母亲节最早被庆祝是在20世纪10年代,不是吗?”have done表示mark的动作发生在谓语动词think之前,且应该是“被庆祝”,故选D。
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